82 



Memoirs of the Indian Museum. 



[Vol.. II, 



the free edge. In my specimens the first step is a rather deep incisure, only bearing 

 slender bristles at its base, while each of the others bears either six or eight stout 

 spines arranged in two parallel rows ; there are three stout spines external to the 

 uppermost step, the outermost spine being the largest and the other two being 

 parallel and not in line. 



Fig. 7. — Maxilla of C. virgatum var. hunteri 



; 50. 



The penis is long and stout, not minutely annulated, but with irregular 

 transverse wrinkles on its distal half. The tip is obtusely pointed and bears a thin 

 tuft of short hairs. The dorsal half of the proximal part bears numerous long, slen- 

 der hairs, which make their appearance also on the ventral half towards the tip. The 

 external surface is coloured of a faint and uniform vinous tinge, which pervades the 

 whole of the animal's integument, including the mouth parts, and is due to the pres- 

 ence of innumerable very minute pigment cells. 



Although, owing to the existence of intermediate forms, I do not consider it ad- 

 visable to divide the species into subspecies or local races (see p. 68, antea), it must be 

 acknowledged that it is possible to distinguish several varieties which have a certain 

 stability. They may be recognized as follows : — 



Var. I (typical form). — Capitulum square above, with well-defined vertical bars 

 of a darker colour than the rest of the membrane. Scutum trilobed but not 

 Y-shaped, the three lobes of equal length. Tergum somewhat sinuate. 

 Habitat. — Atlantic and Arctic Ocean, Pacific, Mediterranean. 

 Var. II {intermedia, nov.). — Tergal margin of the capitulum forming an angle 

 considerably greater than a right angle with the carinal margin ; stripes 

 distinct. Tergum straight. Carina somewhat sinuate or angulate. Scutum 

 Y-shaped ; the lobe pointing towards the carina shorter than the other two. 

 Habitat. — On bottom of ship from Brazil {Cornalia). 

 Var. Ill {Cineras hunteri, Owen). — Upper part of capitulum not or barely angu- 

 late behind. Stripes obsolete or obsolescent. Tergum straight or nearly 

 so. Carina usually arched. Scutum narrowly Y-shaped. 

 Habitat. — Indian Ocean, S. Pacific. 



