HATSCHEKIA CLUTHJ1. 117 



4. Hatschekia cluthae (T. Scott). 

 (Plate XXXIII, fig. 1 ; Plate XXXIV, figs. 1-5.) 



1902. Clavella cluthae T. Scott. (114) p. 292, pi. xii, figs. 26-31. 



Female. — With a general resemblance to the female 

 of H. labmcis (van Beneden) recorded above, bnt 

 much larger, and the lateral margins of the cephalic 

 segment evenly rounded instead of being angular as 

 in that species. The genital segment, the form of 

 which is also somewhat different from that of H. 

 labracis, becoming gradually wider posteriorly, so that 

 the widest part near the hinder end is about twice as 

 wide as it is immediately posterior to the cephalon ; the 

 segment narrowing convexly and somewhat rapidly 

 behind the widest part to the obscurely-angulated ex- 

 tremity. Abdomen and caudal rami very small. 



Antennules apparently only four-jointed, moderately 

 stout and furnished with a few minute spines, the basal 

 joint about as long as the next three taken together, 

 but the end joint very small. Antennas fully as long 

 as the antennules, and composed of two joints, each 

 provided with a short but strong terminal hook-like 

 claw. Max ill as very small and simple in structure, 

 consisting each of a minute papilliform basal joint, 

 bearing three^small spines. Maxillipeds small, two- or 

 three-jointed, and furnished with small terminal claws. 

 Both pairs of thoracic legs biramose and somewhat 

 similar in structure ; the basiopodite tolerably stout 

 and composed of two joints; the rami also two- 

 jointed, and armed with small terminal spines ; the 

 first joint of the outer ramus larger than the second and 

 carrying a small spine at its outer distal angle, while 

 on the other hand the end joint of the inner ramus is 

 the larger one ; the second basal joint also with a 

 Bmall spine on its inner distal angle. 



Caudal rami very short ; the egg-strings also toler- 

 ably short and slender. Colour somewhat similar to 

 that of the gills of the fish. Length about 1*5 mm. 

 exclusive of the egg-strings. 



