Morphological Notes. 



23 



and Streetsia, or at a considerable distance therefrom as in Xipho- 

 cephalus, is occupied by the eyes. Tlie under side of the head is 

 excavated, forming a groove or channel from the base of the head to the 

 anterior end of the eyes, where the channel is enlarged into a vaulted 

 chamber, at the upper anterior wall of which the first pair of antennas 

 are fixed. In this channel the second pair of antennae are received 

 when folded, extending into the lower part of the chamber below the 



Fig. 9. Streetsia 

 pronoides. Ç. 



Fi(j. 10. Leptocotis Fir/. 11. Calamorkynclms 



spiniyera. Facsimile from pellucidus. Facsimile from 

 Streets, Pel Amph., pi. 1. Streets, Pel. Amph., pi. 1. 



Fiij. 13 TullhenjeUa 

 cu.tpidatci. 



first pair. Immediately in front of the bases of the first pair of antennae 

 the rostrum commences, its underside being open in Oxycephalus, 

 Streetsia, Gl ossocephalus, Cranocephalus, Tullbergella, and 

 Calamorhynchus, and more or less closed in Stebbingella, Dory- 

 cephalus, Leptocotis, and Xiphocephalus. The under margins of 

 the rostral walls are often sharply serrated. 



4. The eyes. 



As in most of the Hyperiidean families they eyes are also strongly 

 developed in the Oxycephalids, and consist of a great number of ocelli. 

 These ocelli are not separated into an upper-eye, (Scheitel-Auge, Claus), 

 and two lateral portions on each side as in Thyropus and other genera, 

 but in all the genera of the family Oxycephalidse, with the exception of 

 Streetsia and Calamorhynchus, the ocelli are distributed into two 

 lateral portions separated from one another at the crown of the head 

 by a more or less narrow space. In Streetsia and Calamorhj'^nchus 

 on the other hand all the the ocelli are fused together into one mass, 

 occupying the whole of the central part of the head. The ocelli consist 



