394 REPORT OP COMMISSIONER OF FISH AND FISHERIES. 



lobe of the head. Exteriorly they form about two-thirds of the -lateral 

 margin of the head. Their interior boundary is in the form of three 

 sides of a hexagon, separated at their nearest points by a lit He, more 

 than the transverse diameter of the. eye,. The anli-uimhe an- .about, as 

 long as the head, composed of eight segments and separated at Hie base. 

 The first segment is short and stout ; the, next two a little, longer, but 

 scarcely distinguishable from the following five, llagcllar segments, which 

 decrease in size to the last. The antenna-, are, eomposed of ten segments. 

 They are more slender than the antennuhe, and surpass them by about 

 two segments. The first two segments are, broader than the, following 

 three, which are also somewhat larger than the, five (lamellar segments. 



The first thoracic segment is shorter than the head, but much longer 

 than any of the sueceeding segments, which to the sixth are of equal 

 length, each about one-third shorter than the first. The sevent h segment 

 is about one- third shorter than the sixth. The fifth and sixth are, broadest, 

 each being about one-third broader than the first. The epirnera do not 

 project behind the angles of the segments to which they are attached. 

 The legs differ but little throughout. The first pair are shortest, and 

 the first three pairs are somewhat stronger than the last four, which are 

 armed with a few scattered short spiuules. The seventh pair are the 

 longest. 



The pleon is a little longer than the seven thoracic segments. The 

 fifth segment is broader behind than in front, and the last segment is as 

 broad at the insertion of the uropods as the third segment, and is rounded 

 behind. Anterior pleopods with the basal segment nearly square. Tin; 

 uropods are unlike on the opposite sides in the specimen figured. The 

 normal form is probably seen in the right uropod, which surj the 



telson by less than half the length of the outer ramus. This ram us is 

 longer than the inner, narrow, with nearly parallel sides and is obliquely 

 truncated at the tip. The inner ramus is somewhat diarnond->haped. 

 The ciliation is nearly rudimentary and might be overlooked. The b,i.-al 

 segment is alike on the two sides and has the inner distal angle acute and 

 but slightly produced. 



Length 13 mm , breadth 3.6 mm ; color in alcohol yellowish, with minute 

 black specks most abundant on the pleon; eyes black, conspicuous. 



The specimen w*as obtained June 1, 1874, by Mr. S. F. Clark, at Savin 

 Eock !, near Xew Haven, from the mouth of a squid (LoligoPealii), whence 

 the specific name. Two specimens " parasitic on young mullet " are i n the 

 Tale College Museum, collected at Fort Macon !, X. C., by Dr. H. C. 

 Yarrow, which appear to belong to this species, showing that it is not 

 confined to the squid. 



Livoneca Leach. 

 Liconeca Leach, Diet. Sci. nat., tome xii, p. 351, 1-1-. 



Head small, projecting in front over the bases of the antennulge. which, 

 like the antennae, are short ; legs all alike and armed with strong curved 

 dactyli; body broad, oval, often obliquely distorted. 



